122029987 has 2 divisors, whose sum is σ = 122029988. Its totient is φ = 122029986.

The previous prime is 122029949. The next prime is 122029991. The reversal of 122029987 is 789920221.

It is a strong prime.

It is an emirp because it is prime and its reverse (789920221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122029987 is a prime.

It is not a weakly prime, because it can be changed into another prime (122029937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61014993 + 61014994.

It is an arithmetic number, because the mean of its divisors is an integer number (61014994).

Almost surely, 2^122029987 is an apocalyptic number.

122029987 is a deficient number, since it is larger than the sum of its proper divisors (1).

122029987 is an equidigital number, since it uses as much as digits as its factorization.

122029987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 122029987 is about 11046.7183814923. The cubic root of 122029987 is about 496.0081985182.

The spelling of 122029987 in words is "one hundred twenty-two million, twenty-nine thousand, nine hundred eighty-seven".